Cita APA (7th ed.)

Beth, H. L., Hader, A., & Kappel, R. (1984). 25 years of world shipping. Fairplay.

Cita Chicago (17th ed.)

Beth, Hans Ludwig, Arnulf Hader, i Robert Kappel. 25 Years of World Shipping. Londres: Fairplay, 1984.

Cita MLA (9th ed.)

Beth, Hans Ludwig, et al. 25 Years of World Shipping. Fairplay, 1984.